Pierce has a stress reaction, a swelling of the bone and the soft tissue surrounding it, team spokesman Jeff Twiss said Thursday. Pierce will miss Friday night's game against Philadelphia and the five-game trip that starts Tuesday in Denver.
"I'm not sure if he's going to accompany the team, but he will not play on the road trip," Twiss said.
Pierce said his foot started hurting after Saturday's game in Charlotte. He felt pain again after Wednesday night's 96-95 loss to Golden State in which he scored 27 points and had an MRI on Thursday morning.